Casio-ClassWiz-Fx-991EX-Advanced-Scientific-Calculator-Casio-FX-991EX-S-UT-P-The-Casio-Fx-991EX-part-of-Casio-s-ClassWiz-series-offers-a-new-high-resolution-LCD-display-with-192-x-63-pixels-and-a-resolution-that-is-four-times-higher-than-that-of-the-familiar-displays-of-the-old-FX-ES-plus-series-In-addition-the-new-ClassWiz-series-boasts-new-hardware-with-a-faster-processor-and-double-the-memory-P-P-A-spreadsheet-function-allows-the-user-to-perform-basic-spreadsheet-calculations-on-a